Revert "statSync"

This reverts commit 92b6076.

Author: otaviomacedo

packages/aws-cdk/lib/cli/display-version.ts

@@ -38,8 +38,7 @@ export class VersionCheckTTL {
 
   public async hasExpired(): Promise<boolean> {
     try {
-      // const lastCheckTime = (await fs.stat(this.file)).mtimeMs;
-      const lastCheckTime = fs.statSync(this.file).mtimeMs;
+      const lastCheckTime = (await fs.stat(this.file)).mtimeMs;
       const today = new Date().getTime();
 
       if ((today - lastCheckTime) / 1000 > this.ttlSecs) { // convert ms to sec